The culture was a race of humanoidnatives who had curious skin coloring, divided perfectly along the middle: some were black on the left side and white on the right, others were white on the left side and black on the right. Two sides were deeply divided, with those black on the right side oppressing those white on the right side. Several millennia ago, both sides completely wiped each other out in a series of wars based on mutual racial hatred. There were only two known survivors, one of each side: of the black-right, Bele, Chief Officer of the Commission on Political Traitors; and of the white-right, Lokai, a revolutionary. Bele would pursue Lokai across the galaxy for millennia to come. (TOSepisode: "Let That Be Your Last Battlefield")

When the Enterprise returned to the planet later, they learned that Bele and Lokai had set up bases on opposite sides of the planet, continuing their pointless hatred even with only each other for company. (TOSnovel: No Time Like the Past)